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Acrylate polyurethane water-dispersed resin and its making method

A technology of acrylic polyurethane and acrylate, applied in the field of acrylic polyurethane water-dispersible resin and its preparation, can solve the problems of low solid content, limiting the use range of acrylic polyurethane water-dispersible resin, prolonging the drying time of coating film, etc., to achieve resin viscosity low effect

Inactive Publication Date: 2006-12-20
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low solid content and high water content, the drying time of the coating film is prolonged, which affects the construction and application performance of the coating prepared with it, and limits the application range of the acrylic polyurethane water-dispersible resin.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] NCO-terminated polyurethane prepolymers were first synthesized using standard polymerization techniques. Add 368.6g polyoxypropylene glycol (average molecular weight is 1167.0), 56.4g dimethylol propionic acid, 23.0g1,4-butanediol in the dry and clean reaction flask that thermometer, stirring device, condenser are housed, 337.0g of isophorone diisocyanate, 300.0g of methyl methacrylate, 60.0g of butyl acrylate and 1.0g of dibutyltin dilaurate, under the protection of nitrogen gas, stirred and heated to 80°C, kept for 4 hours for reaction. Determine that the NCO value is close to the theoretical value, lower the temperature to below 56 ° C, add 38.0 g of triethylamine to neutralize, keep warm at 50 ° C for 10 to 30 minutes, disperse in 2284.5 g of deionized water, and add 52.5 g of ethylenediamine in water (40 %) for chain extension, keep the reaction for 15-30 minutes and then set aside.

[0049] Secondly, the water-dispersible resin of the present invention is synthes...

Embodiment 2

[0051] NCO-terminated polyurethane prepolymers were first synthesized using standard polymerization techniques. Add 322.0g polytetrahydrofuran diol (average molecular weight is 1000.0), 41.5g dimethylol propionic acid, 29.4g diethylene glycol, 316.0 g of isophorone diisocyanate, 280.0 g of methyl methacrylate, 50.0 g of butyl acrylate and 1.0 g of dibutyltin dilaurate, under nitrogen protection, stirred and heated to 80°C, and kept for 4 hours for reaction. Determine that the NCO value is close to the theoretical value, lower the temperature to below 56°C, add 38.0g of triethylamine to neutralize, keep warm at 50°C for 10 to 30 minutes, then disperse in 2083.4g of deionized water, and add 72.5g of ethylenediamine aqueous solution (40 %) for chain extension, keep it for 15-30 minutes and then set it aside.

[0052] Secondly, the water-dispersible resin of the present invention is synthesized according to the soap-free core-shell emulsion synthesis technique. The aqueous polyu...

Embodiment 3

[0054] NCO-terminated polyurethane prepolymers were first synthesized using standard polymerization techniques. Add 381.4g polyoxypropylene diol (average molecular weight is 1167.0), 44.8g dimethylol propionic acid, 24.0g diethylene glycol, 334.0g Isophorone diisocyanate, 302.0g of methyl methacrylate, 58.0g of butyl acrylate and 1.0g of dibutyltin dilaurate were protected by nitrogen gas, stirred and heated to 80°C, and kept for 4 hours for reaction. Determine that the NCO value is close to the theoretical value, lower the temperature to below 56 ° C, add 37.0 g of triethylamine to neutralize, keep warm at 50 ° C for 10 to 30 minutes, disperse in 2225.0 g of deionized water, and add 67.5 g of ethylenediamine in water (40 %) for chain extension, keep it for 15-30 minutes and then set it aside.

[0055] Secondly, the water-dispersible resin of the present invention is synthesized according to the soap-free core-shell emulsion synthesis technique. The polyurethane aqueous disp...

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Abstract

This invention relates to a high solid acrylic polyurethane water-dispersible resin and method for making same. The solid content of this resin is up to 41-45%, and the resin does not contain free emulsifier and organic solvent. The procedures comprise: first it produces NCO capping polyurethane prepolymer with the ethenyl monomer part of which can be freely polymerized as medium, then obtain a water-dispersible polyurethane coated with ethenyl monomers after neutralization and water dispersion, add in the rest ethenyl monomer and initiator to perform free radical polymerization, to produce the acrylic polyurethane water-dispersible resin with a nuclear shell structure. This resin is characterized of high solid content, fast drying speed, stable storage, filming at room temperature, good adhesive force, flexility, hardness, and water resistance, low VOC content, and reasonable quality and cost ratio, and can be used in producing high-grade woodware coating material, water leather paint, and surface coating of plastic, metal, scrim and automobile.

Description

technical field [0001] The invention relates to an acrylic polyurethane water-dispersible resin and a preparation method thereof, in particular to a high-solid acrylic polyurethane water-dispersible resin and a preparation method thereof. Background technique [0002] Due to the special segment structure of polyurethane, it has better physical and mechanical properties, such as hardness, flexibility, impact resistance, adhesion and other properties; while acrylate emulsion has better water resistance, solvent resistance, and low cost. lower. Therefore, many researchers are working on combining the two to obtain better performance. After the development in recent years, the acrylic polyurethane water-dispersible resin has been developed rapidly. The acrylic polyurethane water-dispersible resin prepared by chemical method not only has the characteristics of both acrylate and polyurethane, but also has good low-temperature film-forming properties and good storage stability. ...

Claims

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Application Information

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IPC IPC(8): C08L75/14C08G18/10C08G18/48C08F2/44
Inventor 孔志元何庆迪史立平殷武朱柯蔡青青
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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